The process which invovles the treatment of the ore with a suitable reagent so as to make it soluble but not…
The process which invovles the treatment of the ore with a suitable reagent so as to make it soluble but not impurities is called
Froth floatation
Roasting
Hydrometallurgy
Leaching
Solution
(Leaching is based on the principle of relative/ selective solubility to concentrate an ore from its impurities.
e.g., in $\mathrm{Al}_2 \mathrm{O}_3$ ore from bauxite.